Method And Device For Representing A Digital Image On A Surface Which Is Non-Trivial In Terms Of Its Geometry And Photometry

a technology of digital images and projection surfaces, applied in the field of methods and devices for representing digital images on projection surfaces, can solve the problems of non-white texturizing or differences in texturizing projection surfaces that have a negative effect on display, recording natural scenes, especially in the dark, and achieve the effect of correct projection of digital images
US20080095468A1Active Publication Date: 2008-04-24VIOSO GMBH
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Patent Information

Authority / Receiving Office
US ยท United States
Patent Type
Applications(United States)
Current Assignee / Owner
VIOSO GMBH
Publication Date
2008-04-24

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Abstract

The invention relates to a method and a device for representing a two-dimensional digital image on a projection surface, whereby at least one projector projects the content of an image buffer onto the projection surface. The aim of the invention is to provide a method and a device which allow to project a digital image onto a background having any surface structure and / or color in such a manner that any influences on the image caused by the background are compensated to the last pixel for at least one special observer perspective. In a special embodiment, definition of the representation is optimized to the last pixel even on an uneven background. For this purpose, the digital image is processed during a rendering step by geometrically distorting it using a two-dimensional pixel-offset field which contains information on the projection surface, and by manipulating the color of the image by means of a two-dimensional surface texture of the projection surface. A least a part of the processed image is rendered in an image buffer and a rectangle is written into the image buffer for initiating the rendering step, thereby compensating scattered light influences. The invention especially relates to a system comprising a plurality of projectors. Definition of representation can be optimized to the last pixel by means of definition values and representation is furthermore possible subject to the observer's position.
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Description

BACKGROUND OF THE INVENTION

[0001] The invention relates to a method and an apparatus for representing a digital image on a projection surface, and the content of an image buffer being projected onto the projection surface by means of a projector.

[0002] In the context of the invention, a projection surface is in principle any desired surface. In particular a projection surface in the context of the invention can be a surface that is non-trivial in terms of geometry and photometry that, for instance, has any desired three-dimensional shape and / or any desired texture. In the context of the invention a projection surface can in particular also comprise a plurality of partial surfaces.

[0003] A system is known from DE 102 51 217 B3 for automatic calibration of multiple projector systems that has at least two projectors, one digital camera, and a control unit for controlling the projectors and the camera, automatic calibration occurring with the steps of generation, recording and image ...

Claims

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